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A157157 Nonprime numbers containing equal number of odd nonprime digits and even prime digits. 0
12, 21, 92, 102, 120, 123, 124, 125, 126, 128, 132, 142, 152, 162, 172, 182, 201, 209, 210, 213, 214, 215, 216, 217, 218, 231, 249, 259, 261, 279, 289, 290, 294, 295, 296, 297, 298, 312, 321, 329, 392, 412, 429, 492, 512, 529, 592, 612, 621, 629, 692, 712 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Odd nonprime digits are 1 or 9 and even prime digit = 2.

The definition presumably implies that the number of odd nonprime digits and the number of even prime digits are both larger than zero. [From R. J. Mathar, Feb 26 2009]

LINKS

Table of n, a(n) for n=1..52.

CROSSREFS

Cf. A141468.

Sequence in context: A137480 A316267 A228766 * A218043 A048344 A039402

Adjacent sequences:  A157154 A157155 A157156 * A157158 A157159 A157160

KEYWORD

nonn,base,less

AUTHOR

Juri-Stepan Gerasimov, Feb 24 2009

EXTENSIONS

Missing numbers added by R. J. Mathar, Feb 26 2009

STATUS

approved

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Last modified July 5 20:21 EDT 2020. Contains 335473 sequences. (Running on oeis4.)